Interlocking grate-bar



UNIT j. ATES .PATT OFFC.

SAML. VANSYCKEL, OF JERSEY CITY, NEV JERSEY.

INTERLOCKING GRATE-BAR.

Specification of Letters Patent No. 13,669, dated October 9, 1855.

To all whom 'it may concer/n:

Be it known that I, SAMUEL VANsYoKnL, of Jersey City, Hudson county, State of New Jersey, have invented certain new and useful Improvements in Self Locking or Fastening Grate-Bars for Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part thereof, in which- Figure l, represents a perspective view of several of the bars separated, to show t-he project-ions and depressions by which they catch and hold one with the other. Fig. Q represents the reverse side of the bars as represented in Fig. l. Fig. 3, represents a top view of a nest of bars as laid in the furnace, and Fig. 4L, represents an end view of the same.

Similar letters where they occur in the several figures denote like parts.

The object of my invention is to so cast grate bars, as that they may be free to yield to the consequent expansion and contraction they are subjected to, but so that they shall not warp or twist by the heat, or get out of their proper places, from any cause, and consists in casting suitable projections and depressions on each bar under and against which they shall catch one on the other, so that the whole series, will firmly hold themselves in place, while a single bar may be readily removed and replaced by another in case it should give way.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

a, a, represent any suit-able number of bars all cast exactly alike, and having upon one of each of their sides, projections c, C, which begin at or near the lower edge of the bar, and extend upward to about one half the height or depth of said bar; and on their opposite sides other projections e, e, which begin at or near the top of the bar and extend downward far enough to meet and rest on or against those c, on the adjacent bar. These projections, are

slightly tapering on their outer sides so as to t closely against the adjacent bars to keep them in pla-ce laterally, while those on one side of the bar are underneath, the set,

on theV adjacent bar, and thus prevent them from rising vertically.

The ends of all the bars (except the two extreme outside ones) are of a Z shaped form having projections z', z', on their opposite corners, under and over which similar projections on the next bar catch or interlock, (as seen in Fig. 4L) to keep the ends of the bars from rising one above the other.

It will be perceived that, so far as dei scribed, the bars which are all alike, so lit or interlock with each other as to prevent them from rising vertically; and it only remains tobe shown how they are similarly interlocked in a transverse direction, to prevent them sliding horizontally, farther than is necessary to allow for the natural expansion and contraction of the metal under the high degree of heat which they are to be subjected to.

By reference to Fig. 2, m represents a projection in rear of the recess n, which catches behind the projection z', on the next bar to it; and at the other end of the bar, is a projection 0 Fig. 1 which fits into a recess 1" (Fig. 2) in the adjacent bar, which prevents either bar from sliding horizontally. They are thus perfectly interlocked in a vertical and horizontal direction both, each bar being molded from thev same pattern, and consequently perfectly matching, one with the other.

I have spoken only of the bars which lie within the two outside bars. These outside bars resemble at their ends an upright, and inverted L shaped appearance, and serve as keys to hold the nest of bars within them together, and are fully shown in Figs. l'

and et, marked s s. They have on their faces t-oward the center of the nest projections and recesses, over, under, and against which the projections and recesses on the bars a, a, catch and hold, as heretofore described.

To fill a furnace with the bars herein described the end bar s (Fig. 4L), is first laid down, and then the bars a, a, a, one after the other, each being pushed up against the preceding one, until the furnace is filled just near enough, to drop in the end bar s, which last named bar, may, as a better security, be keyed or otherwise fastened into the set, but as the heat is much less at the extreme sides of the furnace than at the as that when laid together they shall interlock one over, under, or behind the other, in such manner as to prevent' them moving vertically and horizontally, or from warping or twisting, while they may be readily removed or replaced, as herein set forth.

SAML. VANSYCKEL.

Vitnesses:

M. MACGREGOR, J r., N. P. TODD. 

